Synthesis Of Imidazo[1,2-a]pyridin-5-one Derivatives with a β-Hydroxyethyl Group on the Nitrogen Atom
摘要:
Imidazo[1,2-a]pyridin-5-ones 2 with a beta-hydroxyethyl group on the nitrogen atom are synthesized by the reaction of heterocyclic ketene aminals 1 with ethyl propiolate in moderate yields.
Synthesis of Heterocyclic Ketene Aminals with a β-Hydroxyethyl Group on the Nitrogen Atom
摘要:
The heterocyclic ketene aminals 4 with a beta-hydroxyethyl group on the nitrogen atom are synthesized by the reaction of the corresponding ketene mercaptals 3 with 2-(2-aminoethylamino)ethanol. In the case of 3 with one aroyl substituent, besides the ketene aminals 4, the benzoate of ketene aminals 5 are also isolated.